摘要
通过模型试验研究了直墙拱形和圆形巷道的破裂特征,通过数值模拟研究了直墙拱形、圆形、正方形、长方形和三心拱形巷道的破裂特征。对比了模型试验与数值模拟的结果,两者吻合较好,验证了数值模拟的合理性。分析了断面形式对巷道塑性区、位移及应力的影响。针对巷道所具有的破坏形式及特征,开展了相应的支护对策研究。最后得出,相同条件下,巷道断面曲率变化越小,巷道围岩破裂范围越小,破裂程度越轻。深部巷道采用锚杆加强两帮支护能够有效控制变形,加强两帮支护是一种经济高效的支护方式。
Through the model test,the fracture characteristics of straight-wall-top-arch and circular roadways were studied. Through the numerical simulation,the fracture characteristics of straight-wall-toparch,circular,square,rectangular and three center arch roadways were studied. The results of model test and numerical simulation were compared. Analysis showed that good agreement between the results verify the numerical simulation was reasonable. The influences of the section forms on the plastic zone,displacement and stress of the roadway were analyzed. According to the failure mode and characteristics of roadway,research on support measures were carried out. Finally,it was concluded that under the same conditions,the smaller the curvature of roadway section was,the smaller the surrounding rock was,the more the rupture degree was. Strengthening bolt support of both sides of roadway could enhance the whole stability of surrounding rocks of roadway,it was a kind of economical and effective support method.
作者
米春荣
徐勇
王芳华
李建明
王汉鹏
MI Ch.unrong XU Yong WANG Fanghua LI Jianming WANG Hanpeng(Shandong Academy of Building Research, Ji＇ nan,Shandong 250031, China Shandong Jihua Gas Co. , Ltd. , Ji＇nan,Shandong 250013, China Research Center of Geotechnical and Structural Engineering, Shandong University, Ji＇ nan,Shandong 250061, China)
出处
《施工技术》
CAS
北大核心
2017年第20期106-111,共6页
Construction Technology
关键词
巷道
支护
断面形状
破裂特征
数值模拟
roadway
supports
section form
fracture characteristics
simulation
